Gamma ray astronomy [electronic resource] : final report, July 13, 1989-January 12, 1991 / prepared by William S. Paciesas ; prepared for George C. Marshall Space Flight Center ... submitted by Department of Physics, The University of Alabama in Huntsville.
Imprint
Marshall Space Flight Center, Ala. : National Aeronautics and Space Administration, George C. Marshall Space Flight Center ; [Springfield, Va. : National Technical Information Service, distributor, 1991]